Non-ponding flat roof edging

Abstract

A replacement edging for gravel stop edging for use on flat roof buildings is disclosed. The unit features an inverted L-shaped, the terminal area of the vertical section thereof being bent and formed around to retain the edge of an overlaid layer of APR, attactic polypropylene rubber. During the roof construction process, the balance of the APR is torched into place onto the metal member. The rest of the roof construction process is otherwise conventional. The process of on site application of the new edging is also disclosed.

I claim:  
     
       1. In combination an inverted L-shaped metal unit having a horizontal section of greater depth than the elevation of the vertical section thereof, the vertical section also including a flange portion which extends the length of the vertical section, but for a short finite distance at one end of the vertical section, and a sheet of APR wedgedly connected along one edge thereof to said metal unit; 
       wherein the sheet of APR extends both rearwardly and laterally of the metal unit.  
     
     
       2. In the combination of  claim 1  wherein the sheet of APR extends both rearwardly and laterally of the metal portion. 
     
     
       3. The process of forming a roof edging for installation as by nailing, which process comprises: 
       (A) forming an inverted L shaped unit having a horizontal section of greater depth than the elevation of the vertical section, and a flange portion depending from the vertical section the entire length thereof, save for a short finite distance,  
       (B) overlaying a sheet of APR onto the inverted L unit,  
       (C) bending the APR downwardly along and beyond the vertical section,  
       (D) folding the flange portion upward and over the APR to form a wedge to retain the APR.  
     
     
       4. The process of installing a new roof which comprises: 
       (A) installing over a sub roof having a membrane thereon, an edging comprising a inverted L-shaped member having a terminal wedge retaining a sheet of APR,  
       (B) torching down the APR to the L-shape member, later in time during the roofing process, torching the balance of the APR down to retain it in place.  
     
     
       5. The process of  claim 4  including the further step of priming the metal unit prior to the torching step. 
     
     
       6. The process of  claim 4  including applying Cap sheet over the edging and torching it down. 
     
     
       7. An edging for use on flat roof buildings, which edging unit comprises an inverted L-shaped metal portion, which metal portion has a horizontal section and a vertical section, the vertical section having a flange depending therefrom, wherein the vertical section and horizontal sections are equal in lateral extension, but the depth of the horizontal section is greater than the elevation of the vertical section; 
       the said flange extending laterally a finite distance less than the lateral extension of the vertical section, and being adapted to be bent upwardly;  
       a sheet of APR being attached to said flange by a bending of the flange up and over the APR to form a wedge to retain the edge of the APR layer sheet, such that the balance of the APR overlays the said metal portion.  
     
     
       8. The device of  claim 7  wherein the lateral extension of the flange is about four inches less than the lateral extension of the vertical section of the metal portion. 
     
     
       9. In the device of  claim 8  wherein the APR extends rearwardly from two to about four inches beyond the metal portion's depth, and the APR extends laterally beyond the flange to which it is affixed such as to in part overlie the metal portion to which it is affixed, an amount equal to the lateral extension of the flange free length of the vertical section. 
     
     
       10. An arrangement comprising at least two of the devices of  claim 9  laterally abutting relationship of their metal portion's vertical sections with a flange free area between adjacent flanges, wherein the laterally extending area of APR from the first of said at least two devices overlaps the flange free area of the second of the at least two devices, and the APR of said first of said at least two devices overlays in part the metal portion of the second of said at least two devices.